Drill-spindle-rotating mechanism for close-corner drills.



G. H. PEOK. v DRILL SPINDLE ROTATING MECHANISM FOR CLOSE CORNER DRILLS.

APPLICATION FILED JUNE 19, 1913.

Patented Mar. 10, 1914,

w i Lava:

cazwb w 4.

Wit weaned MN- Gait: ea, c. MM

COLUMBIA PLANQGRAPH co., WASHINGTON, D4 c.

UNITED STATES PATENT OFFICE.

CAII) H. PEGK, OF ATHENS, PENNS-YLVA NIA, ASSIGNOR TO INGERSOLL RAND COM- PANY, OF JERSEY CITY, NEW JERSEY, A CORPORATION OF NEW JERSEY.

Specification of Letters Patent.

Patented Mar. 10, 1914.

Application filed June 19, 1913. Serial No. 774,537.

To all whom it may concern Be it known that I, OAID H. Pnon, a citizen of the United States, residing at Athens, in the county of Bradford and State of Pennsylvania, have invented a certain new and useful Improvement in Drill-Spindle- R-otating Mechanism for Close- Corner Drills, of which the following is a specification.

This invention relates to fluid operated drills for use in restricted spaces, gen erally known as close corner drills, and relates more particularly to mechanism for transforming the reciprocating movementof the piston into rotary movement of the drill spindle.

The object of my invention is to provide a drill of a shape capable of easy passage into restricted spaces, and, at the same time, to provide a simple and direct means for transforming the reciprocating motion of a fluid operated piston into rotary motion at the drill spindle.

With this object in view, I have devised a drill, a practical embodiment of which is shown in the accompanying drawings in which;

Figure 1 shows a vertical longitudinal section through the drill casing, and Fig. 2 shows a longitudinal section on the line 2-2 of Fig. 1.

As shown the drill comprises an elongated casing 1 which is provided at one end with a cylindrical spindle bearing 2, the ends of which project vertically in both directions from the casing 1. In the spindle bearing 2 is journaled the drill spindle 3 which is provided with the ordinary Morse tapered socket 4. The outside of the intermediate portion of the drill spindle 3 is provided with ratchet teeth 5. The drill spindle 3 passes through apertures in the ends of the two driving ratchet levers 6 and 7, these levers 6 and 7 swinging about the spindle 3 as an axis and being provided with spring pressed pawls 8 and 9 for engaging the teeth 5 of the spindle in one direction.

In the inner ends of the arms 6 and 7 are arcuate racks 10 and 11. These racks 10 and 11 intermesh with driving pinions 12 and 13 which are mounted on pins 14: and 15, which extend through the casing from top to bottom on each side, in a direction parallel to the drill spindle. The pinions l2 and 13 do not intermesh but between them is an oppositely toothed rack 16 which engages the adjacent portions of both pinions. This rack is attached to a piston rod 17 of a driving piston 18 which reciprocates in a cylinder 19 attached to the casing in a longitudinal direction. The reciprocation of the piston 18 is governed by a valve 20 of ordinary construction, the details of which form no part of the present invention. A handle 21 is secured to the back end of the cylinder the driving fluid for op erating the piston being taken through the handle 21.

The operation of the drill will be evident from the above description. The rack 16 will give the pinions 12 and 13 an oscillating motion in opposite directions which, by means of the racks 10 and 11, will transmit an alternate reciprocating motion to the ratchet arms 6 and 7 which, by means of the pawls 8 and 9, will cause the drill spindle 3 to have a practically continuous rotation.

It is to be understood that the present showing and description discloses only one specified modification of my invention and other forms and modifications are included in the spirit and scope of the inventions as expressed in the claims.

Vhat I claim is:

1. In a drilling mechanism, a drill spindle, a pair of ratchet arms engaging said spindle, arcuate racks on said arms driving pinions engaging said racks and a reciprocable rack for rotating said pinions in opposite directions.

2. In a drilling mechanism, a toothed drill spindle, a pair of ratchet arms engaging said spindle, arcuate racks on said arms, spaced driving pinions engaging said arcuate racks, and an oppositely toothed reciprocable rack between and intermeshing with said driving pinions.

In testimony whereof, I have hereunto set my hand.

F. A. Plnnon, J. I. LANGELAND.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

